Kazuyoshi Kurosa

Chemical ecology of astigmatid mites—XLV. (2R,3R)-Epoxyneral: Sex pheromone of the acarid mite Caloglyphus sp. (acarina: acaridae)1

(2R,3R)-2,3-Epoxy-3,7-dimethyl-6-octenal [(2R,3R)-epoxyneral] was identified as the female sex pheromone from an acarid mite, Caloglyphus sp. (Astigmata:Acaridae), whose phoretic hypopi had been collected from the Cockchafer, Melolontha japonica (Coleoptera: Scarabaeidae). Sexual activity of the males was induced by exposure to a 0.1-1 ng dose of synthetic (2R,3R)-epoxyneral. The enantiomer of the pheromone, (2S,3S)-epoxyneral, was inactive and its admixture did not inhibit the activity of the natural pheromone.

Rosefuran: The Sex Pheromone of an Acarid Mite, Caloglyphus Sp.

Rosefuran was identified as a female sex pheromone from an unnamed species of acarid mite, Caloglyphus sp., whose phoretic hypopi had been collected from the elongated yellowish chafer, Heptophylla picea. Behavior of sexually excited males was demonstrated by exposing them to doses of 1–100 ng of synthetic rosefuran. The pheromone was present in females and also in males and was detected in trace amounts in nymphal stages. Pheromone concentrations were estimated to be 87 ± 14.2 ng per female and 10.4 ± 2.5 ng per male. The quantitative difference between sexes may allow males to discriminate females for purposes of mating.

A new species of Dorsipes (Acari: Podapolipidae), ectoparasite of Amara gigantea (Coleoptera: Carabidae) from Japan

Abstract Dorsipes curtonoti n. sp. is described from Amara (Curtonotus) gigantea Motschulsky (Coleoptera: Carabidae) from Japan. This is the first record of the inflatus group of Dorsipes in Japan. The new species and two additional species of Dorsipes in the group inflatus are compared with each other and species in the groups dorsipes and platysmae. Figures of instars of D. inflatus and D. notopus not previously illustrated and keys to groups and species of Dorsipes are presented.

Two new species of Dorsipes (Acari: Podapolipidae) ectoparasites of Carabus spp. (Coleoptera: Carabidae) from Japan

Abstract Dorsipes limnocarabi n. sp. and D. yezoensis n. sp. are described from Carabus (Limnocarabus) clathratus aquatilis Bates and Carabus (Carabus) granulatus yezoensis Bates (Coleoptera: Carabidae) from Japan. These are the first records of Dorsipes in Japan. The new species and 2 additional species of Dorsipes in the subgroup Dorsipes are compared with each other and species in the subgroups Inflatus and Platysmae.

4-Isopropenyl-3-oxo-l-cyclohexene-l-carboxyaldehyde, isorobinal: A novel monoterpene from the miteRhizoglyphus sp. (Astigmata: Rhizoglyphinae)

All mite species belonging to As t igmata are equipped with a pair of opisthonotal glands which contain a set of volatile compounds, such as monoterpenes, hydrocarbons, esters, and aromatics, characteristic to each species. Some of these show various functions along with interesting chemical structures [1]. Rhizoglyphus sp. 1 (Astigmata: Acaridae) collected from Kochinda, Okinawa, Japan, is demonstrated here to possess a new cyclic monoterpenoid (I). GC and G C / M S analysis of the hexane extract revealed that the mite possesses four exudates apar t from the already reported neral [2], neryl formate [3], aacaridial [4], t r idecane [5], and robinal [6]. Two of them were determined as eicosadienal and eicosenal by aH-NMR and high MS, and the structure of the third remains obscure at present. The fourth, a new monoterpenoid (I), has the M + ion at m/z 164, which is the same as that of robinal, and the base ion at m / z 68 along with a diagnostic ion at m/z 96. This informat ion suggests that the compound is an isomer of robinal which can be cleaved into two parts, m / z 68 and 96, by retro Diels Alder rearrangement. To obtain further spectral data for elucidation of the structure I, the hexane extract was purif ied by HPLC to isolate ca. 500 gg I from 5 g of mites. The UV (CHC13) spectrum yielded gave 2ma x at 228 and 217 nm. The tHNMR (300MHz, CDC13) revealed 12 protons (Table 1). Compar ison of the chemical shifts of structure I with those of isopiperi tenone (6-isopropenyl-3methyl-2-cyclohexen-l-one) [7] and robinal (4-isopropylidene-3-oxo1-cyclohexene-l-carboxyaldehyde) [6] conf irmed the compound I to possess an isopropenyl group and a structure of 7keto-a ,~-unsaturated aldehyde. [For comparison: isopropenyl of isopiperitenone appeared at 6 4.76 (IH, m), 4.95

A new genus and species, Simalurapolipus hiraii (Acari: Heterostigmatina: Podapolipidae) parasitic on Simalura coerulea (Coleoptera: Tenebrionidae) in Japan

Abstract Simalurapolipus hiraii n. gen., n. sp. (Acari: Podapolipidae) collected in Shizuoka Prefecture, Japan is described from Simalura coerulea (Lewis) (Coleoptera: Tenebrionidae) and compared with Tenebrapolipus ceropriae Kurosa and Husband, 2001 from Ceropria induta (Wiedemann, 1819) and T. imasakai Kurosa and Husband, 2001 from Ceropria laticollis Fairmaire,1903 collected in Japan. The unusual occurence of many larval females of the species on the host body surface is reported.

Two new genera and a new species of mites (Acari: Podapolipidae) associated with weevils (Coleoptera: Curculionidae) in Argentina.

Abstract Curculapolipus trisetosus n. gen., n. sp. (Acari: Podapolipidae) is described from weevils (Coleoptera: Curculionidae), Heilipus wiedemanni, collected from Gran-Bourg, Buenos Aires, Argentina. Rhinopolipus n. gen., is erected for Tetrapolipus lundi (Husband, 1987) from Guadalcanal. The new genus is compared with 12 related genera of podapolipid adult female mites with 2 pairs of legs. A key to the genera is included.

Dorsipes diplocheilae sp. nov. and Dorsipes zeelandicae sp. nov. (Acari: Podapolipidae), subelytral parasites of Diplocheila zeelandica (Redtenbacher) (Coleoptera: Carabidae) in Japan

Abstract Two of three new species of Podapolipidae (Acari: Tarsonemoidea) discovered under the elytra of Diplocheila zeelandica (Coleoptera: Carabidae) are described under the names Dorsipes diplocheilae sp. nov. and D. zeelandicae sp. nov. This is the first record of species in the dorsipes group of the genus Dorsipes from the genus Diplocheila. Adult females of species in the dorsipes group share the plesiomorphic character of two pairs of setae on plate EF. The vagina is not broad and the opening is terminal. The male genital capsule is not broader at its base than at its apex. Putative apomorphies for adult females of the dorsipes group are: coxal setae 3a not present, setae v1 reduced, ambulacra I claws small and tarsi II solenidia omega absent. Dorsipes diplocheilae and D. zeelandicae are compared with five species from Europe, Asia and western North America in the dorsipes group, parasites of carabid beetles in the genus Carabus. Revised keys to species of the group dorsipes are provided.

A new genus and three new species of Podapolipidae (Acari: Tarsonemina) parasitic on Nicrophorus and Silpha (Coleoptera: Silphidae) in Japan and Ukraine

Abstract Silphopolipus nicrophori, S. eidelbergi and S. obscurae n. gen., n. spp. (Acari: Podapolipidae) are described from Nicrophorus quadripunctatus Kraatz, Silpha carinata Herbst and S. obscura L. (Coleoptera: Silphidae) collected in Japan and Ukraine, and compared with related species. This is the first record of podapolipid mites from silphid beetles.

A new genus and two new species of Podapolipidae (Acari: Tarsonemina) parasitic on Ceropria (Coleoptera: Tenebrionidae) in Japan

Abstract Tenebrapolipus ceropriae and T. imasakai n. gen., n. spp. (Acari: Podapolipidae) collected in Japan are described from Ceropria induta and C. laticollis (Coleoptera: Tenebrionidae). They are compared with related species.